problems = list(map(int, input().split()))
level = list(map(int, input().split()))
level, T = level[:-1], level[-1]

ans = 0
for i in sorted(range(4), key=lambda x: level[x]):
    ans += min(problems[i], T // level[i])
    T -= level[i] * min(problems[i], T // level[i])

print(ans)